# Movement and Position

## Movement and Position

### Distance

**Distance**is a scalar quantity representing how much ground an object has covered during its motion.- Distance does not take into account the direction of the motion.
- It’s measured in
**metres (m)**.

### Displacement

**Displacement**is a vector quantity representing the object’s overall change in position.- Displacement takes into account the direction of the motion.
- It’s measured in
**metres (m)**as well, but with an attached direction (north, south, east, west, etc.).

### Speed

**Speed**is the rate at which an object covers distance.- A fast-moving object has a high speed and covers a large distance in a short amount of time.
**Average speed**can be calculated by dividing the total distance travelled by the total time taken.

### Velocity

**Velocity**is a vector quantity representing the rate at which an object changes its position.- It takes into account direction, unlike speed.
**Average velocity**can be calculated by dividing total displacement by the total time taken.

### Time

**Time**is a scalar quantity measured in**seconds (s)**.- It’s used in calculations of both speed and velocity.

### Acceleration

**Acceleration**is a vector quantity that represents the rate of change of velocity of an object within a certain period of time.- It is measured in metres per second squared
**(m/s²)**. - It occurs when an object speeds up, slows down, or changes direction.

### Motion Graphs

- Motions of objects can be represented using
**motion graphs**, including distance-time graphs and velocity-time graphs. - A horizontal line on a distance-time graph suggests the object is
**stationary**. - A sloping line on a distance-time graph indicates
**steady speed**, and the steepness of the slope represents the speed. - A curving line on a distance-time graph indicates
**acceleration or deceleration**. - The gradient on a velocity-time graph represents the
**acceleration**. A horizontal line shows steady speed.

Becoming confident in these concepts and definitions will aid in understanding more complex principles involved in forces and motion.